Finding the Fourth Proportional to 2,111.13, 3,170.61 and 1,800.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.13 : 3,170.61 = 1,800.63 : x
2. Step 2: Convert to fraction form
   2,111.13/3,170.61 = 1,800.63/x
3. Step 3: Cross multiply
   2,111.13x = 3,170.61 × 1,800.63
4. Step 4: Simplify right side
   2,111.13x = 5,709,095.48
5. Step 5: Solve for x
   x = 5,709,095.48/2,111.13
6. Step 6: Final answer
   x = 2,704.28